docs: def login_to_registry(username, token=None):
      """
      Login within docker daemon to docker registry running in this OpenShift cluster
      :return:
      """
  
      token = token or get_oc_api_token()
  
      with DockerBackend() as backend:
          backend.login(username, password=token,
                        registry=get_internal_registry_ip(), reauth=True)